Signaling instrument



H. HRIG SIGNALING IN Jam. 20. 1925.

S TRUMENT Filed Deo.

Patented .lain 20, 1925.,

HEINRICH HRIG, F STUTTGART, GERMANY, ASSIGNOR T0 ROBERT BOSCH AKTIEN- GESELLSCHAFT. OF STUTTGART, GERMANY.

SIGNALING INSTRUMENT.

Application Med December 2G, '19293. Serial No. 609,059.

To all whom t may concern.'

Be it known that I, HEINRICH HRIG, a citizen of Germany, residing at Stuttgart, Germany, have invented certain new and useful llmprovements in a Signaling Instrument; and l do hereby declare the following to be a full, clearfand exact description of the invention, such as Will enable others skilled in the art to Which it apperl@ tains to make and use the same.

This invention relates to signaling instruments, especially for power vehicles, Which have a directly vibrated diaphragm. The diaphragm can be actuated 'by electromagnetic, manual, or any other suitable means, and if actuated electromagnetically, the diaphragm itself can serve as the armature or it can bel connectedvWith-,the armature.

The. fact has been'discovered by this in- Venter that with such instruments the fullv ness of the tone and `the sounding' distance are materially improved if at the horn side of the diaphragm, at the place of its greatest oscillation, a vibratory body is so aflixed that it is not in contact with the diaphragm, except at the point of connection with it. That vibratory body may either be rigid so as to be incapable of oscillations of itsl own, or it may be made a self-contained toneproducing member by a material and a shape thaare suited to this purpose.

The si plest shape is that of a disk. A modification may consist of a plurality of 'disks which are'` axed to a common caracts in the manner of a socalledrpistonf" diaphragm, that is to sa the entire column of air present in front o the vlbratory body rier and are suitably spaced. Or the vibrais pushed out at the greatest oscillation of the diaphragm so that the tone of the latter to which the vibratory body is attached is intensified. Furthermore, the air present 1n the space between the diaphragm,v the vibratory body, and the Wall of the horn, has a natural vibration which is apt to in# vfluence the color of the instruments tone.

the sound conduit at the portion thereofA immediately adjacent said vibratory body, because by this arrangement the best eifect of the vibratory body in intensifying and coloring sounds produced by the diaphragm and projecting them from the conduit-is obtained. Furthermore, a column of air is thus held between the diaphragm and the vibratory body and this column of air, being set in vibration by the diaphragm and vibratory body, assists in coloring the tone of the instrument. The vibratory body overlies a large, and most desirably a major, portion of the diaphragm, as shown, in order to get the maximum effect of the reflections and counter-reflections of sounds from the diaphragm to the vibratory bod and vice versa. With vibratory bodies Wit elastic natural vibrations the proportions may be so chosen that the vibratory body delivers harmonic upper tones with respect to the fundamental oscillation of the diaphragm. If the vibratory body is. hollow and open towards the horn, then, finally,

also the tone-producing effect of the air enclosed in the hollow space la s a rle. I

My invention is illustrate., y way of example, in the accompanying drawings '1n which i ;`B`ig.-"1V 'shows diagrammatically in longitudinal section a motor car horn embodying this invention, and

the disc is connected with the diaphragml only at the region `of greatest oscillations,

andl that the aforesaid extension of rod d by which the disc is thus connected to the diaphragm also serves to space the disc from said diaphragmqln the embodiment vof the invention illustrated in Fig. 2,.the

vibratory body ef is hollow or cup-shaped and has an open end extendingtoward the exit of the sound conduitor horn.

.-I claim: Y A i 1. A signaling instrument', especially for power vehicles, comprising the combination, with a sound-producing diaphragm, means for oscillating the same, and a sound conduit leadingY from said diaphragm, of a vibratory body' disposed in said conduit and connected with the diaphragm'solely at the region of greatestoscillations of said diaphragm by means spacing it` from the diaphragm, said vibratory body occupying a large part of the crossfsectio'nal area of the immediately adjacent portion of said conduit but being arranged to oscillate out ofcontact with the walls of said conduit.

2. A. signaling instrument, especially for power vehicles, comprising the combination, with a sound-producing diaphragm, means for oscillating the same, and a sound conduit lleading from said diaphragm, of a rigid vibratory body disposed in said conduit and connected with the diaphragm solely at the region of greatest oscillations of said diaphragm by means spacing it from the diaphragm, said vibratory body occupying a large part of the cross-sectional area of the immediately adjacent portion of said conduit but being arranged to oscillate out of contact with the walls of said conduit.

A signaling instrument, especially for power vehicles, comprising the combination, with a sound-producing diaphragm, means for oscillating the same, and a sound conduit leading from said diaphragm, of a tone-coloring vibratory body disposed in said conduit and connected with the diaphragm solely at the region of greatest oscillations of said Y dia hragm by means spacing it from the diap ragm, said vibratory body occupying a large part of the cross-sectional area of the immediately -adjacent portion of said conduit but being arranged to oscillate out of contact with the walls of said conduit.

4. A signaling instrument, especially for power vehicles, comprising the combination, with a sound-producing iaphragm, means vfor oscillating the saine, and a sound conduit leading iromsaid diaphragm, of a discshaped vibratory body disposed in said conduit and connected with the diaphragm solely at the regionof greatest oscillations of said diaphragm by means spacing it Jfrom the diaphgram, said vibratory body occupy ing a large part ofthe cross-sectional area of the immediately adjacent portion of said conduit but' being arranged to oscillate out of contact with the walls of said conduit.

`5. A signaling instrumenh'especially for power vehicles, comprising` the combination,l with a soundproducing diaphragm,'means for oscillating the same, and a sound conduit leading from said diaphragm, of a tonecoloring vibratory member disposed within said conduit and connected with said diaphragm solely at the region of greatest oscillations of said diaphragm by means spacing it from the diaphragm, said vibratory member being' located between said diaphragm and the sound exit of said conduit and being arranged to oscillate wholly out of contact with the walls of said conduit, said vibratory body occupying af-large part of the cross-sectional area of the immediately adjacent portion 'of said conduit. 6. A signaling instrument, especially forA power vehicles, comprising, in combination, a sound-producing diaphragm, means for oscillating the same, a sound conduit leading from saidv diaphragm, and a vibratory body disposed in said conduit and connected. to said diaphragm solely at the vregion of greatest oscillations of saiddiaphragm by means spacing it from the diaphragm, said 106 body overlying a major portion of said diaphragm but being free to oscillate in said conduit without contacting thewalls thereof.

7. A signaling instrument, especially for power vehicles, comprisin the combination, 110 with a sound-producing iaphragm, means for oscillating the saine, and a sound conduit leading from said diaphragm, of a vibrato body disposed in said conduit and connectgd `with said diaphragm solely at the region of greatest oscillations of said diaphragm by means spacing it from the diaphragm, the cross-sectional areas of said vibrato body, said diaphragm, and'that part of the sound conduit in which said vibratory body is disposed approximatin each other in extent, said vibratory body ing arran d to oscillate outof contactwith the we ls of said conduit.

S. A signaling instrument, especially for power vehicles, comprising, in combination,

'a sound-producing diaphragm, means for oscillating said diaphragm, a sound conduit, and a vibratory body disposed in said conduit and connected with the diaphragm solely at the region of the greatest oscillations of sai; diaphragm by means spacing it fom the diaphragm, said' vibretory body comprising a hollow'body having an open end extending toward the exit of seid sound conduit and arranged to osciilate 'out of contact with the Wals ofsaid conduit HEiNRICH HRIG. In the yiresence of:

.MAURICE W. ALTAFFER, i

Emo SPrm 

